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10 July, 15:01

The perimeter of a rectangle is 36 meters. The length is 2 meters more than three times the width find the length of the rectangle

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  1. 10 July, 15:54
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    To start, create an equation comparing the length and width. As the question says the length is 2 more than 3 times width, you can set l=2+3w. Now, solve this equation for w, w = (l-2) / 3. Next, write your equation for perimeter, p=2l+2w. Now, plug in your value for w and p, 36=2l+2 ((l-2) / 3). Now, solve for l. 36=2l+2 ((l-2) / 3), distribute the 2, 36=2l + (2l-4) / 3, create a common denominator, 36 = (6l+2l-4) / 3, multiply by 3 on both sides, 108=8l-4, add 4 to both sides, 112=8l, divide both sides by 8, l=14. This means your length is 14 meters.
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